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E-6
<br /> Part 2: Mound Systems
<br /> A sewage treatment mound is a seepage bed elevated by clean sand Mounds must be
<br /> fill to provide an adequate separation distance between the rock layer carefully
<br /> in the mound and the barrier layer such as saturated soil conditions COI1Stl'(.ICt@CI
<br /> or bedrock. The mound must be carefully constructed to provide
<br /> adequate sewage treatment.
<br /> Mound failures have usually been traced to improper construction
<br /> practices.
<br /> PERFORATED
<br /> �.�,.,�:�_; __ LATERALS
<br /> SANDY LOAM SOIL �.� ,- '''' �.��; , -„':;"' - -- �; .
<br /> _ •' � ;::�+ �` /' ' J,/ n/,
<br /> % ,��
<br /> I.AYER OF GEOTEXTILE ..:Y . � " � ,� � .• '�`�
<br /> FABRIC OR 4 INCHES OF ` ;-f:,�i.�,,,,� " . � .�
<br /> HAY COVEREO BY � .- � .,�'
<br /> BUILDING PAPER �!`� ., �'�� f� / x, :�
<br /> I �/ OR 2,. .r::i_. .�� '`%i� / /' !v�
<br /> :,;,�.., . , � :
<br /> PIPE �ROM PUMP� ';�.-, ��, i.;j�`��•' / �'
<br /> � �/' ,! /� ��;
<br /> '�'� ,� ,, j, ,, �� ,: �
<br /> 3� — 2'� . ...� '� �/ ^ i.�� �/ ,��''� .�
<br /> ,.N ✓ , � � �
<br /> CL�A F�OCK , � ' ��/' ,y � DIVERSION FOR
<br /> �� '� ,..� .� �/ � � J.I SURFACE WATER
<br /> 6" TOPS01�� , � *
<br /> '� ��' ,�' r; /
<br /> -,t..,� ..;•.��_- �� �+`'� fs '��•✓ t��
<br /> � h?;. - ' .;' .�;.
<br /> _�'��`Y` � „�,`:� r 9 ,/ / MAx '�,.
<br /> � �^�_ _w� t '� { I � .��.:
<br /> '` % ik J � •�� :.
<br /> � � � �
<br /> sqNp AN`0pE -�-�. ���� " �{ � ;=iK,�'•
<br /> �.�r�..
<br /> F��l SOD , �6 y, Yi,,'.nti`,�'..
<br /> BRpKENAY�R - ���� �+� '�' .
<br /> �p ' �N_ . .:�.-�' -�,�.
<br /> gq qTU �� -''��"�-. _
<br /> RR�ERaa qYeR:.�: �
<br /> Figure E-6
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